Barro, Robert J.
MIT Press, 2003
Buku Teks
Barro, Robert J., author
McGraw-Hill, 1995
Buku Teks
Cindy Yasmin, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2020
UI - Skripsi (Membership)
McCandless, George T., author
Prentice-Hall, 1991
Buku Teks
Chakravarty, Sukhamoy, author
MIT Press, 1969
Buku Teks